Severed: Forest of the Dead

Severed Forest of the Dead is a 2005 Canadian zombie horror film directed by Carl Bessai and set in a remote logging community following an incident where a genetic experiment goes wrong.

The president of the company decides to send his son Tyler to investigate the loss of contact with the loggers, hoping Tyler will learn more about the industry. When he arrives, Tyler discovers most of the loggers and protesters have become zombies. He comes across a bunker where Mac, Rita and Carter have taken shelter, along with other survivors including Macs apprentice Luke Michael Teigen. The company learns of the zombie outbreak when a chemist examining one of Carters samples at their lab is infected by the altered sap. Tylers father wishes to send an evacuation to rescue his son but is overruled by the other members of the board, who decide to set up a quarantine.The survivors leave the bunker and attempt to drive off the island, but they find the road blocked by the company. They get separated and several more victims fall to the zombies. After reuniting at the logging base, Mac recovers another truck and the group decides to travel to another abandoned facility in the hopes of radioing for help. At the camp, Mac finds the radio dead, while Tyler and Rita begin to become close. Luke is dragged off by the zombies when Carter becomes too frightened to help him. Later, Carter becomes overwhelmed by guilt and confesses that the company had him conducting genetic experiments to grow the trees faster, leading to an increase in profit. ........

Source: Wikipedia